Update readme.md

Added GMUnityIntegration to iOS instruction.
Update readme.md
Merge pull request #4 from kakadadroid/master

for @style error
Update and rename Unity3.x.md to unity3.md

Added link to Gimmie SDK for Unity3
Added prefix to iOS integration file methods.
Updated iOS methods name in GimmieBinding.
Added iOS dependencies framework.
Updated iOS readme.
Fixed anonymous login doesn't login.
Updated readme and GimmieBinding for handle need login event.
Update gimmie iOS version in readme.
Changed initGimmie method name to InitGimmie in readme.
Updated readme for handle need login event.
Added rewards country option to readme.
Added wrapper
Added wrapper
Merge branch 'wrapper'

Conflicts:
	unity3.md